Tannin Extraction from Oak Gall and Evaluation of Anti-Oxidant Activity and Tannin Iron Chelation Compared with Deferoxamine Drug
Meghdad Payab,
Mohammad Javad Chaichi,
Ome Leila Nazari,
Fatemeh Yousefnejad Maleki
Issue:
Volume 5, Issue 2, June 2019
Pages:
18-25
Received:
29 May 2019
Accepted:
10 July 2019
Published:
6 August 2019
Abstract: In this study, tannins were extracted by two methods (soaking and Soxhlet) with three different solvents (water, methanol and aqueous methanol 50%) and the three kind plant (walnut shell, gall oak and walnut leaves), that the highest extraction efficiency (82.08%) was related to extraction with aqueous methanol by Soxhlet method from the oak galls. Although the results of soaking were nearly to the Soxhlet. One oak Gall extract was evaluated by Lowenthal method that the result was showed that reducing materials such as tannins are 26.14%. The extracted was evaluated by Folin-Ciocalteu method that suggests phenolic compounds in the extract was 15.27, (61.07± 7.12 mg compared to gallic acid). Result of evaluation of antioxidant activity of the extracted showed the high antioxidant properties of tannins compared to ascorbic acid at less than 100 ppm concentrations, but these properties comparable to ascorbic acid of the higher concentrations, so a lower dose of the extract was may be helpful. The chelation properties of the iron ions at low concentrations of iron (III), oak was showed better performance compared to Deferoxamine but Deferoxamine due to complex formation with higher stoichiometry (1: 6) at high concentrations of Fe (III), has performed better than the oak.
Abstract: In this study, tannins were extracted by two methods (soaking and Soxhlet) with three different solvents (water, methanol and aqueous methanol 50%) and the three kind plant (walnut shell, gall oak and walnut leaves), that the highest extraction efficiency (82.08%) was related to extraction with aqueous methanol by Soxhlet method from the oak galls....
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Development of Co-processed Paracetamol with Hydroxypropyl Methylcellulose (HPMC) and Maltodextrin by Wet Granulation Process
Ortega Leticia,
Gómez Martín,
Daniela Rodríguez
Issue:
Volume 5, Issue 2, June 2019
Pages:
26-32
Received:
5 July 2019
Accepted:
22 July 2019
Published:
7 August 2019
Abstract: The purpose of this work is to improve one of the important physicochemical properties of an active pharmaceutical ingredient (API), as is the water solubility of paracetamol. To improve the physicochemical properties of this API, two pharmaceutical excipients such as the HPMC and maltodextrin were used, which help to improve the solubility, and this helps to the manufacturing process of a pharmaceutical product. Different granule formulations were manufactured by applying a matrix design of experiment where the wet granulation process was performed, combining Paracetamol with the excipients to obtain a uniform particle size and subsequently evaluate the properties of interest. The solubility was evaluated using a method (Mexican pharmacopoeia - FEUM) based on UV / VIS method, performing the calibration curve only for the API to evaluate the granule and calculate the percentage of solubility of these. Favorable results were obtained for two of the seven granule formulations manufactured, the mixture of granule F and G: 25 g of paracetamol, 1.5; 1.75 g of HPMC and 23.5 g; 23.25 of the maltodextrin has a solubility of 104.17% and 101.48% of the G, which shows that the process by wet granulation can improve its solubility. This type of co-processed granule also fulfills the function of masking the bitter taste of paracetamol in one oral pharmaceutical form, as in the case of a syrup and it could be an advantage in the market. The flavor was evaluated by a panel of 20 people and the taste of the syrups that were prepared with the granule with better solubility was compared with the syrups containing only the API dissolved. It is shown that the granules F have improvement in the solubility of paracetamol and can mask the unpleasant (bitter) taste of the active ingredient.
Abstract: The purpose of this work is to improve one of the important physicochemical properties of an active pharmaceutical ingredient (API), as is the water solubility of paracetamol. To improve the physicochemical properties of this API, two pharmaceutical excipients such as the HPMC and maltodextrin were used, which help to improve the solubility, and th...
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